﻿using System;
using System.Text;
using Microsoft.VisualStudio.TestTools.UnitTesting;
using Xpedite.Extensions;

/* Copyright (c) 2010 CBaxter
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), 
 * to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, 
 * and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS 
 * IN THE SOFTWARE. 
 */

namespace Xpedite.Test.Extensions
{
  [TestClass]
  public class ByteExtensionsTest
  {
    [TestMethod]
    public void TestDetectEncoding()
    {
      Assert.AreEqual(Encoding.UTF8.WebName, GetBytesWithPreamble(Encoding.ASCII, "A String").DetectEncoding().WebName);
      Assert.AreEqual(Encoding.BigEndianUnicode.WebName, GetBytesWithPreamble(Encoding.BigEndianUnicode, "A String").DetectEncoding().WebName);
      Assert.AreEqual(Encoding.UTF8.WebName, GetBytesWithPreamble(Encoding.Default, "A String").DetectEncoding().WebName);
      Assert.AreEqual(Encoding.Unicode.WebName, GetBytesWithPreamble(Encoding.Unicode, "A String").DetectEncoding().WebName);
      Assert.AreEqual(Encoding.UTF32.WebName, GetBytesWithPreamble(Encoding.UTF32, "A String").DetectEncoding().WebName);
      Assert.AreEqual(Encoding.UTF8.WebName, GetBytesWithPreamble(Encoding.UTF7, "A String").DetectEncoding().WebName);
      Assert.AreEqual(Encoding.UTF8.WebName, GetBytesWithPreamble(Encoding.UTF8, "A String").DetectEncoding().WebName);
    }

    private Byte[] GetBytesWithPreamble(Encoding encoding, String value)
    {
      Byte[] bytes = encoding.GetBytes(value);
      Byte[] preamble = encoding.GetPreamble();
      Byte[] result = new Byte[preamble.Length + bytes.Length];

      Buffer.BlockCopy(preamble, 0, result, 0, preamble.Length);
      Buffer.BlockCopy(bytes, 0, result, preamble.Length, bytes.Length);

      return result;
    }
  }
}
